<template>
  <div :class="className" :id="id" :style="{height:height,width:width}"></div>
</template>

<script>
import echarts from 'echarts';
import resize from './mixins/resize';

export default {
    mixins: [resize],
    props: {
        className: {
            type: String,
            default: 'chart'
        },
        id: {
            type: String,
            default: 'chart'
        },
        width: {
            type: String,
            default: '200px'
        },
        height: {
            type: String,
            default: '200px'
        }
    },
    data() {
        return {
            chart: null
        };
    },
    mounted() {
        this.initChart();
    },
    beforeDestroy() {
        if (!this.chart) {
            return;
        }
        this.chart.dispose();
        this.chart = null;
    },
    methods: {
        initChart() {
            this.chart = echarts.init(document.getElementById(this.id));

            const xAxisData = [];
            const data = [];
            const data2 = [];
            for (let i = 0; i < 50; i++) {
                xAxisData.push(i);
                data.push((Math.sin(i / 5) * (i / 5 - 10) + i / 6) * 5);
                data2.push((Math.sin(i / 5) * (i / 5 + 10) + i / 6) * 3);
            }
            this.chart.setOption(
                {
                    backgroundColor: '#08263a',
                    xAxis: [{
                        show: false,
                        data: xAxisData
                    }, {
                        show: false,
                        data: xAxisData
                    }],
                    visualMap: {
                        show: false,
                        min: 0,
                        max: 50,
                        dimension: 0,
                        inRange: {
                            color: ['#4a657a', '#308e92', '#b1cfa5', '#f5d69f', '#f5898b', '#ef5055']
                        }
                    },
                    yAxis: {
                        axisLine: {
                            show: false
                        },
                        axisLabel: {
                            textStyle: {
                                color: '#4a657a'
                            }
                        },
                        splitLine: {
                            show: true,
                            lineStyle: {
                                color: '#08263f'
                            }
                        },
                        axisTick: {
                            show: false
                        }
                    },
                    series: [{
                        name: 'back',
                        type: 'bar',
                        data: data2,
                        z: 1,
                        itemStyle: {
                            normal: {
                                opacity: 0.4,
                                barBorderRadius: 5,
                                shadowBlur: 3,
                                shadowColor: '#111'
                            }
                        }
                    }, {
                        name: 'Simulate Shadow',
                        type: 'line',
                        data,
                        z: 2,
                        showSymbol: false,
                        animationDelay: 0,
                        animationEasing: 'linear',
                        animationDuration: 1200,
                        lineStyle: {
                            normal: {
                                color: 'transparent'
                            }
                        },
                        areaStyle: {
                            normal: {
                                color: '#08263a',
                                shadowBlur: 50,
                                shadowColor: '#000'
                            }
                        }
                    }, {
                        name: 'front',
                        type: 'bar',
                        data,
                        xAxisIndex: 1,
                        z: 3,
                        itemStyle: {
                            normal: {
                                barBorderRadius: 5
                            }
                        }
                    }],
                    animationEasing: 'elasticOut',
                    animationEasingUpdate: 'elasticOut',
                    animationDelay(idx) {
                        return idx * 20;
                    },
                    animationDelayUpdate(idx) {
                        return idx * 20;
                    }
                });
        }
    }
};
</script>
